# Snap-Action Switch with 18.5mm Bump Lever: 3-Pin, SPDT, 5A

**Type:** Product page · **SKU:** POLOLU-1405 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/snap-action-switch-with-15-6mm-bump-lever-3-pin-spdt-5a.html ([markdown](https://core-electronics.com.au/snap-action-switch-with-15-6mm-bump-lever-3-pin-spdt-5a.html.md))

This single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch or tactile bump sensor for your robot. The switch body dimension is 20.0 x 6.4 x 10.2 mm, and the 15.6mm lever arm has a semicircular bump at the tip that simulates a roller.

## Pricing

- **Price:** $3.95 (inc GST) — $3.59 AUD, exc GST
- **Quantity discounts:** 10+ $3.45 (exc GST) · 25+ $3.34 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 21 and Aug 24.

## Description

This single-pole, double-throw (SPDT) momentary switch can be used as a general-purpose micro switch or tactile obstacle-detector for your robot. The switch body dimension is 19.8 x 6.4 x 10.2 mm, and the 18.5 mm lever arm has a semicircular bump at the tip that simulates a roller. This three-pin switch can also be used as a two-pin single-pole, single-throw (SPST) switch that is open or closed by default, depending on which two pins are used.

 | ![](https://core-electronics.com.au/media/wysiwyg/0J12557.900.jpg) |
|---|
| Dimensions (in mm) of snap-action switch with 18.5 mm bump lever: 3-pin, SPDT, 5A. |

For a more sophisticated tactile sensor, see Pololu's [force-sensing resistors](https://core-electronics.com.au/force-sensing-resistor-0-6-diameter-circle.html).

**People often buy this product together with:**

 | [![Snap-Action Switch with 16.7mm Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/attachments/localcontent/0J2201_33991dec13.jpg)](https://core-electronics.com.au/snap-action-switch-with-16-7mm-lever-3-pin-spdt-5a.html) | [Snap-Action Switch with 16.7mm Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/snap-action-switch-with-16-7mm-lever-3-pin-spdt-5a.html) |
|---|---|

 | [![Snap-Action Switch with 50mm Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/attachments/localcontent/0J2202_2749f63037.jpg)](https://core-electronics.com.au/snap-action-switch-with-50mm-lever-3-pin-spdt-5a.html) | [Snap-Action Switch with 50mm Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/snap-action-switch-with-50mm-lever-3-pin-spdt-5a.html) |
|---|---|

 | [![Snap-Action Switch with 16.3mm Roller Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/attachments/localcontent/0J10791_3504b277de.jpg)](https://core-electronics.com.au/snap-action-switch-with-16-3mm-roller-lever-3-pin-spdt-5a.html) | [Snap-Action Switch with 16.3mm Roller Lever: 3-Pin, SPDT, 5A](https://core-electronics.com.au/snap-action-switch-with-16-3mm-roller-lever-3-pin-spdt-5a.html) |
|---|---|

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/n/snap_action_switch_with_15.6mm_bump_lever_3_pin_spdt_5a__pololu_1405__00.jpg)